Scientists at the California Institute of Technology in Pasadena have unveiled a quantum microscope that produces images with twice the resolution of conventional microscopes🔬.
When it comes to quantum technologies, computing has dominated headlines around the world. Computers that exploit the laws of quantum mechanics are significantly faster for several classes of problem than even the most powerful supercomputers.
Now Lihong Wang and colleagues at the California Institute of Technology in Pasadena have unveiled a quantum microscope that produces images with twice the resolution of conventional microscopes.Conventional imaging systems are limited in various ways by the properties of light. For example, the resolution of any image is limited by the wavelength of light and the size of the lens aperture collecting the light.
Quantum mechanics offers another solution with entangled photons. These are particles of light that are separated in space but share the same existence. Wang and co say that these photons travel along symmetric paths of the same length and then recombine. When this happens “they behave like a single photon with half the wavelength, leading to a 2-fold improvement in resolution.”
The trick, of course, is to construct an optical set up with exactly these properties, which is what Wang and co have achieved. They call their technique “quantum microscopy by coincidence”.
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